0.5mm CS1 Cable
 Thickness, Diameter and Weight
Number of
pairs		 Minimum sheath
thickness (mm)		 App. Outer
diameter
(mm)		 App. Weight
(kg/km)
5 1.1 8.0 87
10 1.1 9.5 120
20 1.2 12.0 194
30 1.2 14.1 250
50 1.3 16.5 368
100 1.4 22.0 673
200 1.7 28.8 1266
 Makeup, Concentric
Cable
Size		 No. of Pair Size of Units in Centre and Layers
Centre 1st 2nd 3rd 4th 5th
2prs 2 - - - - -
5prs - 5 - - - -
10prs 2 8 - - - -
20prs 1 6 13 - - -
50prs 3 9 16 22 - -
100prs 2 8 14 20 25 31
 Colour scheme, Concentric
1 2 3 4 5 6 7 8 9 10 11 12 13

Pair
Number

1

2

3

 4 5 Last
Wire A B A B A B A B A B A B
Cable                        
5 pairs Orange White Red Grey Blue Brown Red Grey Green Black    
Centre                        
1pr Orange White                    
2pr Orange White Green Black                
3pr Orange White Red Grey Green Black            
Layers Orange White Red Grey Blue Brown Red Grey Blue Brown    
            With even and odd pairs to Green Black
 Colour codes of tape lappings, Unit
Unit No Colour
1 Blue
2 Orange
3 Green
4 Brown
5 Grey
6 White
7 Red
8 Black
9 Yellow
10 Violet
Colour codes of units
Pair No Colour of conductor insulation
  A – wire B – wire
1 White Blue
2 White Orange
3 White Green
4 White Brown
5 White Grey
6 Red Blue
7 Red Orange
8 Red Green
9 Red Brown
10 Red Grey
Electrical Properties
DC resistance @20°C Ohm/km Maximum Average 91
DC resistance @20°C Ohm/km Maximum for 1% of cases 96
Mutual Capacitance nF/km, max Average 53
Mutual Capacitance nF/km, max for 1% of cases 60
Pair to pair capacitance unbalance, pF max 275
Insulation Resistance, 500V DC Minimum Mohm.km 1500
Mechanical Parameters of basic conductors
Nominal Conductor Diameter (mm) 0.5
Maximum Conductor Diameter (mm) 0.51
Minimum Conductor Elongation, % 15
Insulated Conductor diameter (mm) 0.9
Insulation ultimate tensile force minimum (N) 2
Physical Description
Conductors Solid annealed bare copper conductors conforming to CCITT Yellow
Book Vol. III – 2-G.541 b article, IEC 28 and ASTM B3
Insulation Foam-skin polyolefin conforming to ASDM D1248 to BS 6234 Type 03
Cable Assembly Twisted pairs, cabled into sub-units, cabled in a circular form
Color Code As indicated below
Filling
Compound		 Water resistant filling compound, applied to the gaps between the pairs
Tape wrap Non hygroscopic polyester tape, wrapped with 30% overlap
Identification
tape		 A suitable tape, durably marked with the manufacturer’s name, year of
manufacture and type of cable is placed under the core covering
Flooding
compound		 Water resistant flooding compound, applied between the core wrap and
the aluminum foil
Screen ( Shield) Copolymer coated aluminum foil having thickness of 0.3mm, bonded to
the outer jacket, conforming to ASTM B736
Outer Jacket Black PE compound
Surface Marking As per request
General Description
▪ Telephone Cable with cellular polyethylene insulation, jelly filled with petroleum jelly and a
   polyethylene coating.
▪ For use in the Local Distribution network.
▪ Insulated conductors uniformly twisted together to form a pair.
▪ The water resistant filling compound is applied to the air spaces within the cable core to
   provide the water-proofness
▪ Wrapping is applied over the cable core.
▪ A flat aluminium foil coated with copolymer on both sides is applied longitudinally over the
   core covering as screen.
▪ Black linear-low density polyethylene compound is extruded over the screen.
0.5mm CS1 cable
Jelly filled/ Screened/ Unarmoured Telephone Cable

 
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